diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 7a7ad9e..9efe6ac 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -39,7 +39,7 @@ jobs:
     steps:
       - name: Prepare Environment
         run: |
-          apk add --no-cache --update abuild-rootbld alpine-sdk atools-apkbuild-lint bash ca-certificates curl doas git nodejs rsync shellcheck sudo tar
+          apk add --no-cache --update abuild-rootbld alpine-sdk atools-apkbuild-lint bash ca-certificates curl doas git jq nodejs rsync shellcheck sudo tar
           mkdir -p "$ALPINE_APK_REPO_CACHE" "$CARGO_HOME" "$RUSTUP_HOME" "$CARGO_TARGET_DIR"
           chown -R 1000:1000 /cache/public-alpine-packages/${{ matrix.alpine_registry_branch }}
 
@@ -64,6 +64,7 @@ jobs:
 
       - name: Prepare package cache
         if: github.event_name != 'schedule'
+        id: package-selection
         run: |
           scripts/apk/ci-package-cache.sh prepare
 
@@ -71,9 +72,13 @@ jobs:
         if: github.event_name != 'schedule'
         run: |
           scripts/apk/ci-build.sh
-          scripts/apk/ci-package-cache.sh sync
-          scripts/apk/export-ci-assets.sh
-          scripts/apk/list-packages.sh
+          if [ -d packages/local ]; then
+            scripts/apk/list-packages.sh
+          fi
+
+      - name: Export GreptimeDB CI assets
+        if: github.event_name != 'schedule' && steps.package-selection.outputs.greptimedb_selected == 'true'
+        run: scripts/apk/export-ci-assets.sh
 
       - name: Check artifact upload support
         if: github.event_name != 'schedule'
@@ -86,7 +91,7 @@ jobs:
           fi
 
       - name: Upload generated CI assets
-        if: github.event_name != 'schedule' && steps.artifact-upload.outputs.available == 'true'
+        if: github.event_name != 'schedule' && steps.package-selection.outputs.greptimedb_selected == 'true' && steps.artifact-upload.outputs.available == 'true'
         uses: actions/upload-artifact@v3
         with:
           name: greptimedb-musl-binaries-${{ matrix.alpine_registry_branch }}
@@ -97,9 +102,9 @@ jobs:
         run: scripts/apk/ci-smoke.sh
 
       - name: Runtime test
-        if: github.event_name != 'schedule'
+        if: github.event_name != 'schedule' && env.ALPINE_SKIP_BUILD != '1'
         run: scripts/apk/runtime-test.sh
 
       - name: Publish Alpine packages
-        if: github.event_name != 'pull_request' && github.event_name != 'schedule'
+        if: github.event_name != 'pull_request' && github.event_name != 'schedule' && env.ALPINE_SKIP_BUILD != '1'
         run: scripts/apk/publish-gitea.sh
diff --git a/README.md b/README.md
index 4af6842..eea9da1 100644
--- a/README.md
+++ b/README.md
@@ -92,7 +92,7 @@ apk:lint-shell        Run ShellCheck for packaging automation
 apk:packages          List built Alpine packages and dependencies
 apk:publish-check     Run lint, multi-arch build, package listing, and smoke test
 apk:publish-gitea     Publish built packages to the Gitea Alpine package registry
-apk:outdated          Check packaged upstream versions against latest GitHub releases
+apk:outdated          Check packaged upstream versions and release summaries
 apk:shell             Open an Alpine package build shell in Docker
 apk:smoke             Install-test built packages from the local repository in Docker
 apk:test-install      Test README installation instructions in a fresh Alpine container
@@ -231,10 +231,15 @@ versions fail the command:
 APK_UPDATE_CHECK_MODE=fail mise run apk:outdated
 ```
 
+When an update is available, the command also lists compact release-note
+summaries for every release between the packaged and latest versions.
+
 ### Gitea Workflow
 
 `.gitea/workflows/build.yml` builds and publishes `v3.24`. Pull requests
-build only.
+build only. CI compares source package versions with the published registry,
+then rebuilds only changed or unpublished packages; local build commands keep
+using their local caches.
 
 Repository variables:
 
diff --git a/mise.toml b/mise.toml
index a0cb587..a9d53b8 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,6 +1,7 @@
 [tools]
 act = "latest"
 docker-cli = "latest"
+jq = "latest"
 shellcheck = "latest"
 
 [tasks."apk:build"]
diff --git a/packaging/alpine/local/lavinmq/APKBUILD b/packaging/alpine/local/lavinmq/APKBUILD
index 60d5b7c..5f4458b 100644
--- a/packaging/alpine/local/lavinmq/APKBUILD
+++ b/packaging/alpine/local/lavinmq/APKBUILD
@@ -8,7 +8,7 @@ arch="x86_64"
 license="Apache-2.0"
 depends="ca-certificates /bin/sh"
 makedepends="
-	crystal>=1.20.1
+	crystal=1.21.0-r0
 	curl
 	gc-dev
 	help2man
@@ -40,6 +40,7 @@ export CRYSTAL_CACHE_DIR="${CRYSTAL_CACHE_DIR:-$srcdir/crystal-cache}"
 export SHARDS_CACHE_PATH="${SHARDS_CACHE_PATH:-$srcdir/shards-cache}"
 
 build() {
+	crystal --version
 	make
 	make man
 }
diff --git a/packaging/alpine/local/lavinmq/README.md b/packaging/alpine/local/lavinmq/README.md
index d121673..baa8eb9 100644
--- a/packaging/alpine/local/lavinmq/README.md
+++ b/packaging/alpine/local/lavinmq/README.md
@@ -9,8 +9,8 @@ Build command:
 make
 ```
 
-LavinMQ 2.9.1 requires Crystal 1.20.1 or newer, so build with Alpine 3.24 or
-newer.
+LavinMQ 2.9.2 requires Crystal 1.21.0. The package pins Alpine edge's native
+Crystal package, avoiding a glibc toolchain in the Alpine musl build.
 
 ## Runtime Layout
 
diff --git a/scripts/apk/Dockerfile b/scripts/apk/Dockerfile
index a780900..adad333 100644
--- a/scripts/apk/Dockerfile
+++ b/scripts/apk/Dockerfile
@@ -4,6 +4,9 @@ FROM alpine:${ALPINE_VERSION}
 ARG BUILDER_UID=1000
 ARG BUILDER_GID=1000
 
+RUN printf '%s\n' 'https://dl-cdn.alpinelinux.org/alpine/edge/community' \
+    >> /etc/apk/repositories
+
 RUN apk add --no-cache \
     abuild-rootbld \
     alpine-sdk \
diff --git a/scripts/apk/ci-package-cache.sh b/scripts/apk/ci-package-cache.sh
index d41b1ba..6b18fd0 100755
--- a/scripts/apk/ci-package-cache.sh
+++ b/scripts/apk/ci-package-cache.sh
@@ -5,11 +5,29 @@ repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
 # shellcheck source=scripts/apk/package-lib.sh
 . "${repo_root}/scripts/apk/package-lib.sh"
 
-repo_name="${ALPINE_REPO_NAME:-local}"
 arches="${ALPINE_ARCHES:-x86_64 aarch64}"
-cache_root="${ALPINE_APK_REPO_CACHE:-/cache/public-alpine-packages/${ALPINE_REGISTRY_BRANCH:-local}/apk-repo}"
-repo_dest="${repo_root}/packages/${repo_name}"
+branch="${ALPINE_REGISTRY_BRANCH:-v${ALPINE_VERSION:-3.24}}"
+repository="${ALPINE_REGISTRY_REPOSITORY:-${PACKAGE_NAME:-main}}"
+instance_url="${INSTANCE_URL:-}"
+owner="${PACKAGE_OWNER:-}"
 command_name="${1:-prepare}"
+registry_cache="${CI_REGISTRY_CACHE_DIR:-${repo_root}/.cache/ci-registry}"
+
+require_registry_config() {
+  local name="$1" value="$2"
+  [[ -n "${value}" ]] && return
+  printf 'missing required CI registry setting: %s\n' "${name}" >&2
+  exit 2
+}
+
+registry_url() {
+  printf '%s/api/packages/%s/alpine/%s/%s\n' \
+    "${instance_url%/}" "${owner}" "${branch}" "${repository}"
+}
+
+registry_key_url() {
+  printf '%s/api/packages/%s/alpine/key\n' "${instance_url%/}" "${owner}"
+}
 
 all_packages() {
   while IFS= read -r package_dir; do
@@ -18,9 +36,7 @@ all_packages() {
 }
 
 mark_all_packages() {
-  local reason="$1"
-
-  printf 'Rebuilding all packages: %s\n' "${reason}" >&2
+  printf 'Rebuilding all packages: %s\n' "$1" >&2
   all_packages
 }
 
@@ -30,34 +46,23 @@ diff_base() {
 
   if [[ -n "${base_ref}" ]] && git rev-parse --verify "origin/${base_ref}" >/dev/null 2>&1; then
     printf '%s...HEAD\n' "origin/${base_ref}"
-    return
-  fi
-
-  if [[ -n "${before}" && ! "${before}" =~ ^0+$ ]] && git rev-parse --verify "${before}^{commit}" >/dev/null 2>&1; then
+  elif [[ -n "${before}" && ! "${before}" =~ ^0+$ ]] && git rev-parse --verify "${before}^{commit}" >/dev/null 2>&1; then
     printf '%s..HEAD\n' "${before}"
-    return
-  fi
-
-  if git rev-parse --verify "HEAD^" >/dev/null 2>&1; then
+  elif git rev-parse --verify HEAD^ >/dev/null 2>&1; then
     printf 'HEAD^..HEAD\n'
-    return
+  else
+    return 1
   fi
-
-  return 1
 }
 
 changed_packages() {
-  local base
-  local changed_paths
-  local changed_path
-  local package
+  local base changed_paths changed_path package
   declare -A selected=()
 
   if ! base="$(diff_base)"; then
     mark_all_packages "no usable git diff base"
     return
   fi
-
   if ! changed_paths="$(git diff --name-only "${base}")"; then
     mark_all_packages "git diff failed for ${base}"
     return
@@ -72,8 +77,7 @@ changed_packages() {
         ;;
       packaging/alpine/local/*)
         package="${changed_path#packaging/alpine/local/}"
-        package="${package%%/*}"
-        selected["${package}"]=1
+        selected["${package%%/*}"]=1
         ;;
     esac
   done <<< "${changed_paths}"
@@ -83,167 +87,107 @@ changed_packages() {
   done | sort
 }
 
-restore_cache() {
-  if [[ -d "${cache_root}" ]]; then
-    mkdir -p "${repo_dest}"
-    cp -a "${cache_root}/." "${repo_dest}/"
-    printf 'Restored Alpine package repository cache from %s\n' "${cache_root}"
-  else
-    printf 'No Alpine package repository cache found at %s\n' "${cache_root}"
-  fi
+download_registry_metadata() {
+  local arch url
+
+  require_registry_config INSTANCE_URL "${instance_url}"
+  require_registry_config PACKAGE_OWNER "${owner}"
+  mkdir -p "${registry_cache}"
+  url="$(registry_url)"
+  for arch in ${arches}; do
+    curl --fail --silent --show-error --location \
+      --output "${registry_cache}/${arch}.APKINDEX.tar.gz" \
+      "${url}/${arch}/APKINDEX.tar.gz"
+  done
+  curl --fail --silent --show-error --location \
+    --output "${registry_cache}/registry.rsa.pub" \
+    "$(registry_key_url)"
 }
 
-package_apk_names() {
-  local package_dir="$1"
-  local arch="$2"
-
-  apk_package_apk_names "${package_dir}" "${arch}"
-}
-
-package_cache_complete() {
-  local package_dir="$1"
-  local package_name
-  local arch
-  local apk_name
-
-  package_name="$(apk_package_name "${package_dir}")"
+load_registry_index() {
+  local arch package_name package_version
+  declare -gA registry_packages=()
 
   for arch in ${arches}; do
-    case "${arch}" in
-      x86_64|aarch64) ;;
-      *) printf 'unsupported Alpine architecture: %s\n' "${arch}" >&2; exit 2 ;;
-    esac
-
-    if ! apk_package_supports_arch "${package_dir}" "${arch}"; then
-      continue
-    fi
-
-    while IFS= read -r apk_name; do
-      if [[ ! -f "${repo_dest}/${arch}/${apk_name}" ]]; then
-        printf 'Cache miss for %s: missing %s/%s\n' "${package_name}" "${arch}" "${apk_name}" >&2
-        return 1
-      fi
-    done < <(package_apk_names "${package_dir}" "${arch}")
+    while IFS=$'\t' read -r package_name package_version; do
+      [[ -n "${package_name}" && -n "${package_version}" ]] || continue
+      registry_packages["${arch}|${package_name}|${package_version}"]=1
+    done < <(
+      tar -xOzf "${registry_cache}/${arch}.APKINDEX.tar.gz" APKINDEX | awk '
+        /^P:/ { package = substr($0, 3); next }
+        /^V:/ { if (package != "") print package "\t" substr($0, 3); package = "" }
+      '
+    )
   done
-
-  return 0
 }
 
-select_missing_packages() {
-  local package_dir
-  local package_name
+registry_missing_packages() {
+  local package_dir package_name arch spec spec_name spec_version missing
 
   while IFS= read -r package_dir; do
     apk_validate_package_dir "${package_dir}"
     package_name="$(apk_package_name "${package_dir}")"
-    if ! package_cache_complete "${package_dir}"; then
-      printf '%s\n' "${package_name}"
-    fi
-  done < <(apk_all_package_dirs "${repo_root}")
-}
-
-prune_stale_apks() {
-  local package_dir
-  local arch
-  local apk_name
-  local current_apk
-  declare -A expected_apks=()
-
-  if [[ ! -d "${repo_dest}" ]]; then
-    return
-  fi
-
-  while IFS= read -r package_dir; do
-    apk_validate_package_dir "${package_dir}"
+    missing=0
     for arch in ${arches}; do
-      case "${arch}" in
-        x86_64|aarch64) ;;
-        *) printf 'unsupported Alpine architecture: %s\n' "${arch}" >&2; exit 2 ;;
-      esac
-
-      if ! apk_package_supports_arch "${package_dir}" "${arch}"; then
-        continue
-      fi
-
-      while IFS= read -r apk_name; do
-        expected_apks["${repo_dest}/${arch}/${apk_name}"]=1
-      done < <(package_apk_names "${package_dir}" "${arch}")
+      apk_package_supports_arch "${package_dir}" "${arch}" || continue
+      while IFS= read -r spec; do
+        spec_name="${spec%%=*}"
+        spec_version="${spec#*=}"
+        if [[ -z "${registry_packages[${arch}|${spec_name}|${spec_version}]:-}" ]]; then
+          missing=1
+          printf 'Registry miss: %s (%s, %s)\n' "${package_name}" "${arch}" "${spec}" >&2
+        fi
+      done < <(apk_package_versioned_names "${package_dir}" "${arch}")
     done
+    [[ "${missing}" == 1 ]] && printf '%s\n' "${package_name}"
   done < <(apk_all_package_dirs "${repo_root}")
-
-  shopt -s nullglob
-  for current_apk in "${repo_dest}"/*/*.apk; do
-    if [[ -z "${expected_apks[${current_apk}]:-}" ]]; then
-      rm -f "${current_apk}"
-      printf 'Pruned stale cached APK: %s\n' "${current_apk#"${repo_root}/"}"
-    fi
-  done
-  shopt -u nullglob
 }
 
 prepare() {
-  local selected_packages
   local selected
   declare -A selected_map=()
 
-  restore_cache
-  prune_stale_apks
-
+  download_registry_metadata
+  load_registry_index
   while IFS= read -r selected; do
-    [[ -n "${selected}" ]] || continue
-    selected_map["${selected}"]=1
+    [[ -n "${selected}" ]] && selected_map["${selected}"]=1
   done < <(changed_packages)
-
   while IFS= read -r selected; do
-    [[ -n "${selected}" ]] || continue
-    selected_map["${selected}"]=1
-  done < <(select_missing_packages)
+    [[ -n "${selected}" ]] && selected_map["${selected}"]=1
+  done < <(registry_missing_packages)
 
-  selected_packages="$(
-    for selected in "${!selected_map[@]}"; do
-      printf '%s\n' "${selected}"
-    done | sort | xargs
-  )"
-
-  if [[ -n "${selected_packages}" ]]; then
-    printf 'Selected packages for rebuild: %s\n' "${selected_packages}"
-    export ALPINE_PACKAGES="${selected_packages}"
-    export ALPINE_SKIP_BUILD=0
+  ALPINE_PACKAGES="$(for selected in "${!selected_map[@]}"; do printf '%s\n' "${selected}"; done | sort | xargs)"
+  if [[ -n "${ALPINE_PACKAGES}" ]]; then
+    ALPINE_SKIP_BUILD=0
+    printf 'Selected packages for rebuild: %s\n' "${ALPINE_PACKAGES}"
   else
-    printf 'No packages selected for rebuild\n'
-    export ALPINE_PACKAGES=""
-    export ALPINE_SKIP_BUILD=1
+    ALPINE_SKIP_BUILD=1
+    printf 'No packages selected for rebuild: registry satisfies source metadata\n'
   fi
 
   if [[ -n "${GITHUB_ENV:-}" ]]; then
     {
       printf 'ALPINE_PACKAGES=%s\n' "${ALPINE_PACKAGES}"
       printf 'ALPINE_SKIP_BUILD=%s\n' "${ALPINE_SKIP_BUILD}"
+      printf 'ALPINE_REGISTRY_URL=%s\n' "$(registry_url)"
+      printf 'ALPINE_REGISTRY_KEY=%s\n' "${registry_cache}/registry.rsa.pub"
     } >> "${GITHUB_ENV}"
   fi
-}
-
-sync_cache() {
-  if [[ ! -d "${repo_dest}" ]]; then
-    printf 'missing package repository: %s\n' "${repo_dest}" >&2
-    exit 1
+  if [[ -n "${GITHUB_OUTPUT:-}" ]]; then
+    if [[ -n "${ALPINE_PACKAGES}" ]]; then
+      printf 'packages_selected=true\n' >> "${GITHUB_OUTPUT}"
+    else
+      printf 'packages_selected=false\n' >> "${GITHUB_OUTPUT}"
+    fi
+    if [[ " ${ALPINE_PACKAGES} " == *" greptimedb "* ]]; then
+      printf 'greptimedb_selected=true\n' >> "${GITHUB_OUTPUT}"
+    else
+      printf 'greptimedb_selected=false\n' >> "${GITHUB_OUTPUT}"
+    fi
   fi
-
-  prune_stale_apks
-  mkdir -p "${cache_root}"
-  rsync -a --delete "${repo_dest}/" "${cache_root}/"
-  printf 'Updated Alpine package repository cache at %s\n' "${cache_root}"
 }
 
 case "${command_name}" in
-  prepare)
-    prepare
-    ;;
-  sync)
-    sync_cache
-    ;;
-  *)
-    printf 'usage: %s [prepare|sync]\n' "$0" >&2
-    exit 2
-    ;;
+  prepare) prepare ;;
+  *) printf 'usage: %s prepare\n' "$0" >&2; exit 2 ;;
 esac
diff --git a/scripts/apk/ci-smoke.sh b/scripts/apk/ci-smoke.sh
index 6591512..8f5e834 100755
--- a/scripts/apk/ci-smoke.sh
+++ b/scripts/apk/ci-smoke.sh
@@ -2,19 +2,50 @@
 set -euo pipefail
 
 repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+# shellcheck source=scripts/apk/package-lib.sh
+. "${repo_root}/scripts/apk/package-lib.sh"
 repo_name="${ALPINE_REPO_NAME:-local}"
 arch="${ALPINE_ARCH:-$(apk --print-arch)}"
 packages="${SMOKE_PACKAGES:-seaweedfs seaweedfs-master-openrc seaweedfs-filer-openrc seaweedfs-worker-openrc greptimedb lavinmq lavinmq-openrc gitea gitea-openrc}"
 repo_dir="${repo_root}/packages/${repo_name}/${arch}"
+registry_url="${ALPINE_REGISTRY_URL:-}"
+registry_key="${ALPINE_REGISTRY_KEY:-}"
 read -r -a package_list <<< "${packages}"
+declare -A versioned_packages=()
 
-if [[ ! -d "${repo_dir}" ]]; then
-  printf 'missing local repository: packages/%s/%s\n' "${repo_name}" "${arch}" >&2
+while IFS= read -r package_dir; do
+  while IFS= read -r spec; do
+    versioned_packages["${spec%%=*}"]="${spec}"
+  done < <(apk_package_versioned_names "${package_dir}" "${arch}")
+done < <(apk_all_package_dirs "${repo_root}")
+
+for package in "${package_list[@]}"; do
+  if [[ -z "${versioned_packages[${package}]:-}" ]]; then
+    printf 'smoke package is not defined by a source APKBUILD: %s\n' "${package}" >&2
+    exit 2
+  fi
+  package="${versioned_packages[${package}]}"
+done
+
+if [[ -d "${repo_dir}" ]]; then
+  cp "${repo_dir}"/*.rsa.pub /etc/apk/keys/
+  echo "${repo_root}/packages/${repo_name}" >> /etc/apk/repositories
+elif [[ -z "${registry_url}" ]]; then
+  printf 'missing local repository and no registry fallback: packages/%s/%s\n' "${repo_name}" "${arch}" >&2
   exit 1
 fi
+if [[ -n "${registry_url}" ]]; then
+  if [[ ! -f "${registry_key}" ]]; then
+    printf 'missing Alpine registry signing key: %s\n' "${registry_key:-<unset>}" >&2
+    exit 1
+  fi
+  cp "${registry_key}" /etc/apk/keys/
+  echo "${registry_url}" >> /etc/apk/repositories
+fi
 
-cp "${repo_dir}"/*.rsa.pub /etc/apk/keys/
-echo "${repo_root}/packages/${repo_name}" >> /etc/apk/repositories
+for index in "${!package_list[@]}"; do
+  package_list[index]="${versioned_packages[${package_list[index]}]}"
+done
 apk update
 apk add "${package_list[@]}"
 if command -v weed >/dev/null 2>&1; then
diff --git a/scripts/apk/outdated.sh b/scripts/apk/outdated.sh
index 746c9b3..cbcee09 100755
--- a/scripts/apk/outdated.sh
+++ b/scripts/apk/outdated.sh
@@ -13,17 +13,59 @@ fi
 
 github_latest_release() {
   local repo="$1"
-  local api_url="https://api.github.com/repos/${repo}/releases/latest"
   local response
 
   response="$(curl -fsSL \
     -H 'Accept: application/vnd.github+json' \
     -H 'X-GitHub-Api-Version: 2022-11-28' \
-    "${api_url}" 2>/dev/null)" || return 1
+    "https://api.github.com/repos/${repo}/releases/latest" 2>/dev/null)" || return 1
+  printf '%s\n' "${response}" | jq -er '.tag_name'
+}
 
-  printf '%s\n' "${response}" \
-    | sed -n 's/^[[:space:]]*"tag_name":[[:space:]]*"\([^"]*\)".*/\1/p' \
-    | head -n 1
+github_release_rows() {
+  local repo="$1"
+  local current_tag="$2"
+  local page=1
+  local response
+  local release_count
+
+  while :; do
+    response="$(curl -fsSL \
+      -H 'Accept: application/vnd.github+json' \
+      -H 'X-GitHub-Api-Version: 2022-11-28' \
+      "https://api.github.com/repos/${repo}/releases?per_page=100&page=${page}" 2>/dev/null)" || return 1
+    release_count="$(printf '%s\n' "${response}" | jq -er 'if type == "array" then length else error("expected release array") end')" || return 1
+    [[ "${release_count}" -gt 0 ]] || return 0
+
+    printf '%s\n' "${response}" | jq -r '
+      .[]
+      | select(.draft | not)
+      | select(.prerelease | not)
+      | [
+          .tag_name,
+          (.published_at // "-"),
+          (.name // .tag_name),
+          .html_url,
+          (
+            (.body // "")
+            | gsub("[\\r\\n\\t]+"; " ")
+            | gsub("[`*_>#]"; "")
+            | gsub(" +"; " ")
+            | gsub("^ +"; "")
+            | gsub(" +$"; "")
+            | if length > 240 then .[0:237] + "..." else . end
+          )
+        ]
+      | @tsv
+    '
+
+    if printf '%s\n' "${response}" | jq -e --arg tag "${current_tag}" '
+      any(.[]; .tag_name == $tag and (.draft | not) and (.prerelease | not))
+    ' >/dev/null; then
+      return 0
+    fi
+    page=$((page + 1))
+  done
 }
 
 apkbuild_value() {
@@ -104,6 +146,7 @@ printf '%-14s %-14s %-14s %-18s %s\n' "PACKAGE" "CURRENT" "LATEST" "STATUS" "UPS
 
 has_update=0
 has_unknown=0
+release_details=""
 
 while IFS= read -r package_dir; do
   apk_validate_package_dir "${package_dir}"
@@ -121,6 +164,40 @@ while IFS= read -r package_dir; do
       if version_is_newer "${latest_version}" "${current_version}"; then
         status="update-available"
         has_update=1
+        package_details="${package_name}: ${current_version} -> ${latest_version}"
+        case "${version_prefix}" in
+          none|"") current_tag="${current_version}" ;;
+          *) current_tag="${version_prefix}${current_version}" ;;
+        esac
+        if release_rows="$(github_release_rows "${repo}" "${current_tag}")" && [[ -n "${release_rows}" ]]; then
+          current_tag_found=0
+          while IFS=$'\t' read -r release_tag published_at release_name release_url release_excerpt; do
+            [[ -n "${release_tag}" ]] || continue
+            release_version="$(normalize_version "${release_tag}" "${version_prefix}")"
+            if [[ "${release_tag}" == "${current_tag}" ]]; then
+              current_tag_found=1
+            fi
+            if version_is_newer "${release_version}" "${current_version}"; then
+              package_details+=$'\n'
+              package_details+="  ${release_version} (${published_at}) — ${release_name}"
+              package_details+=$'\n'
+              package_details+="    ${release_url}"
+              if [[ -n "${release_excerpt}" ]]; then
+                package_details+=$'\n'
+                package_details+="    ${release_excerpt}"
+              fi
+            fi
+          done <<< "${release_rows}"
+          if [[ "${current_tag_found}" == 0 ]]; then
+            package_details+=$'\n'
+            package_details+="  Note: current release tag ${current_tag} was not found; listed releases compare newer than ${current_version}."
+          fi
+        else
+          package_details+=$'\n'
+          package_details+="  Note: release details could not be fetched."
+        fi
+        release_details+=$'\n'
+        release_details+="${package_details}"
       else
         status="current"
       fi
@@ -139,6 +216,10 @@ while IFS= read -r package_dir; do
     "${upstream_url}"
 done < <(apk_package_dirs "${repo_root}")
 
+if [[ -n "${release_details}" ]]; then
+  printf '\nRelease details:%s\n' "${release_details}"
+fi
+
 if [[ "${mode}" == "fail" && ( "${has_update}" -ne 0 || "${has_unknown}" -ne 0 ) ]]; then
   exit 1
 fi
diff --git a/scripts/apk/package-lib.sh b/scripts/apk/package-lib.sh
index edc77cd..ca85539 100644
--- a/scripts/apk/package-lib.sh
+++ b/scripts/apk/package-lib.sh
@@ -106,7 +106,8 @@ apk_package_apk_names() {
     local pkgrel
     local subpackage
     local subpackages
-    export CARCH="${arch}"
+    # shellcheck disable=SC2034 # APKBUILD reads CARCH while sourced below.
+    local CARCH="${arch}"
     cd "${package_dir}" || exit 1
     # shellcheck source=/dev/null
     . ./APKBUILD
@@ -119,6 +120,31 @@ apk_package_apk_names() {
   )
 }
 
+apk_package_versioned_names() {
+  local package_dir="$1"
+  local arch="$2"
+
+  (
+    set +u
+    local pkgname
+    local pkgver
+    local pkgrel
+    local subpackage
+    local subpackages
+    # shellcheck disable=SC2034 # APKBUILD reads CARCH while sourced below.
+    local CARCH="${arch}"
+    cd "${package_dir}" || exit 1
+    # shellcheck source=/dev/null
+    . ./APKBUILD
+
+    printf '%s=%s-r%s\n' "${pkgname}" "${pkgver}" "${pkgrel}"
+    for subpackage in ${subpackages:-}; do
+      subpackage="${subpackage%%:*}"
+      printf '%s=%s-r%s\n' "${subpackage}" "${pkgver}" "${pkgrel}"
+    done
+  )
+}
+
 apk_container_package_dir() {
   local repo_root="$1"
   local package_dir="$2"